Effect of Drip Irrigation Under Mulch on Nitrogen Transport in Deep Soil Layers in an Agricultural Region of the Xiliao River Plain, China

• DOI: 10.46488/nept.2022.v21i04.002
• Publication Date: 2022-12-02T08:15:38Z
• Authors: Jing Zhang; Haihua Jing; Kebao Dong; Jiaqi Ma; Zexu Jin
• Keywords: Surface irrigation

In the agricultural region of Xiliao River Plain, drip irrigation under mulch has been widely implemented. It not only saves water, but also changes structure underlying surface land, which affects local hydrological cycle to a certain extent, and makes process nitrogen transportation in soil with new characteristics. This study analyzed distribution NH4-N, NO3-N, NO2-N different depths during whole growth period three conditions, including mulch, border irrigation, bare area through field in-situ observation experiment, influence on transport deep layers. The results showed that properties experimental area, creates more water enter layers, was beneficial alleviate downward trend groundwater level extent. average content NH4-N NO3-N higher than irrigation. 1.24 mg.kg-1 80-300 cm, 0.97 2.73 1.99 increment layers greater is significantly Soil significant impact contents NO3-N. indicated compared traditional groundwater, it would increase risk pollution groundwater.